Selective enrichment of Ln(3+) (Ln = Yb; Er) and Cr3+ into SrF2 and ZnAl2O4 nanocrystals precipitated in fluorosilicate glass-ceramics: A dual mode optical temperature sensing study
Selective enrichment of Ln(3+) (Ln = Yb; Er) and Cr3+ into SrF2 and ZnAl2O4 nanocrystals precipitated in fluorosilicate glass-ceramics: A dual mode optical temperature sensing study
复制标题
将 Ln(3)（Ln = Yb；Er）和 Cr3 选择性富集到氟硅酸盐玻璃陶瓷中沉淀的 SrF2 和 ZnAl2O4 纳米晶体中：双模式光学温度传感研究
DOI：
10.1016/j.jnoncrysol.2020.120395
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发表时间：
2021
影响因子：
3.5
通讯作者：
Qian Guodong
中科院分区：
文献类型：
--
作者：
Wadhwa Abhishek;Awasthi Pragati;Ren Kai;Xu Xiuxia;Qiao Xvsheng;Fan Xianping;Qian Guodong
双模式光学测温提供精确的温度传感和自校准优点。为了实现这一点，将氟氧化物前体玻璃转化为同时沉淀SrF 2：Yb 3 +/Er 3+和ZnAl 2 O 4：Cr 3+相的半透明玻璃陶瓷。在980 nm激发下，Er 3+：2 H11/2，4S 3/2→ 4 I15/2实现了强烈的绿色上转换（UC）发光;在535 nm激发下，Cr 3+：2 E，4 T2 → 4A 2实现了增强的红色下转换（DC）发光。UC和DC转变都高度依赖于温度。对铒的热耦合能态（2 H11/2和4S 3/2）的荧光强度比（FIR）研究得出的最大温度传感灵敏度值分别为1.11%K − 1（334 K）和0.66%K − 1（275 K）。同样，Cr 3+的温度依赖发光寿命归因于宇称禁戒（2 E → 4A 2）和自旋允许（4 T2 → 4A 2）弛豫产生的跃迁，在435 K时产生最大温度传感灵敏度值，等于0.19%K − 1。
The dual mode optical thermometry offers precise temperature sensing with self-calibration merit. To realise this, an oxy-fluoride precursor glass was transformed to a semi-transparent glass-ceramic having simultaneously precipitated SrF2:Yb3+/Er3+and ZnAl2O4:Cr3+phases. Under 980 nm excitation, intense green up-conversion (UC) luminescence of Er3+:2H11/2,4S3/2→4I15/2and under 535 nm excitation, enhanced red down-conversion (DC) luminescence lifetime of Cr3+:2E,4T2→4A2was realized. Both the UC and DC transitions were highly reliant upon temperature. The fluorescence intensity ratio (FIR) study of erbium's thermally coupled energy states (2H11/2and4S3/2) produced maximum temperature sensing sensitivity values of 1.11% K−1at 334 K and 0.66% K−1at 275 K, respectively. Likewise, temperature dependent luminescence lifetime of Cr3+attributed to the transitions arising from the parity forbidden (2E →4A2) and spin allowed (4T2→4A2) relaxations produced maximum temperature sensing sensitivity value equal to 0.19% K−1at 435 K.